Creating the fermion mass hierarchies with multiple Higgs bosons

Bauer, Martin; Carena, Marcela; Gemmler, Katrin

doi:10.1103/physrevd.94.115030

Cited by 35 publications

(36 citation statements)

References 28 publications

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“…Operators of the type H † i H iχ χ, i = 1, 2, which do not induce pseudoscalar couplings are not explicitly included. This omission can be justified if one considers a new softly broken symmetry under which the SM singlets H † 1 H 2 ,χχ andχγ 5 χ are charged [27,28]. We will however not constrain the discussion to this case.…”

Section: Jhep07(2018)107mentioning

confidence: 99%

Universal properties of pseudoscalar mediators in dark matter extensions of 2HDMs

Bauer

Klassen

Tenorth

2018

J. High Energ. Phys.

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Abstract:We discuss universal signals of consistent models of pseudoscalar mediators for collider searches for Dark Matter. Keeping only the degrees of freedom that can not be decoupled due to consistency conditions, we present a universality class of simplified models with pseudoscalar mediators and renormalizable couplings to Standard Model fields. We compute stability and perturbativity constraints, constraints from electroweak precision measurements, collider searches for new heavy particles as well as constraints from relic density measurements and indirect detection experiments searching for signals of Dark Matter annihilation into photons. We find that the mono-Z final state is the strongest, universal signal of this class of models, with additional signatures present in the different ultraviolet completions that can be used to distinguish between them.

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Section: Jhep07(2018)107mentioning

confidence: 99%

Universal properties of pseudoscalar mediators in dark matter extensions of 2HDMs

Bauer

Klassen

Tenorth

2018

J. High Energ. Phys.

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“…The discovery of the Higgs particle at the LHC and the study of its production and decay has shown that the VEV of the Higgs field gives the dominant contribution to the masses of the fermions of the third generation, namely to the top and bottom quarks, as well as the τ-lepton. It is conceivable that the masses of the quarks of the first two generations arise from a different source [14][15][16][17][18][19][20] so that the quark mass matrices have the form…”

Section: Generating the Masses Of The First Two Quark Generationsmentioning

confidence: 99%

What if the masses of the first two quark families are not generated by the standard model Higgs boson?

et al. 2016

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We point out that in the standard model there is meaningful quark mixing even in the extreme chiral (EC) limit, where only the third generation of quarks acquires mass. This mixing is in general expected to be of order 1 and the fact that jV 13 j 2 þ jV 23 j 2 ≈ 1.6 × 10 −3 implies a novel fine-tuning problem in the SM which we point out for the first time. We propose a possible way of avoiding this fine-tuning by introducing a symmetry S which leads to V CKM ¼ 1, with only the third generation of quarks acquiring mass. We consider two scenarios for generating the mass of the first two quark generations and full quark mixing based on the assumption that the masses of the first two quark families are not generated by the standard Higgs. One consists of the introduction of a second Higgs doublet which is neutral under S. The second scenario consists of assuming new physics at a high energy scale, contributing to the masses of light quark generations, in an effective field theory approach. This last scenario leads to couplings of the Higgs particle to ss and cc which are significantly enhanced with respect to those of the SM. In both schemes, one has scalar-mediated flavor-changing neutral currents which are naturally suppressed. Flavor-violating top decays are predicted in the second scenario at the level Brðt → hcÞ ≥ 5 × 10 −5 .

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“…[35,36] for recent models with a flavor modular symmetry and also for such interactions in string models.3 Models with a combination of Higgs doublets H u H d as a flavon are studied in Refs. [41][42][43].…”

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confidence: 99%

“…3 Models with a combination of Higgs doublets H u H d as a flavon are studied in Refs. [41][42][43].…”

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confidence: 99%

A low-scale flavon model with a ℤN symmetry

Higaki

Kawamura

2020

J. High Energ. Phys.

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We propose a model that explains the fermion mass hierarchy by the Froggatt-Nielsen mechanism with a discrete Z F N symmetry. As a concrete model, we study a supersymmetric model with a single flavon coupled to the minimal supersymmetric Standard Model. Flavon develops a TeV scale vacuum expectation value for realizing flavor hierarchy, an appropriate µ-term and the electroweak scale, hence the model has a low cutoff scale. We demonstrate how the flavon is successfully stabilized together with the Higgs bosons in the model. The discrete flavor symmetry Z F N controls not only the Standard Model fermion masses, but also the Higgs potential and a mass of the Higgsino which is a good candidate for dark matter. The hierarchy in the Higgs-flavon sector is determined in order to make the model anomaly-free and realize a stable electroweak vacuum. We show that this model can explain the fermion mass hierarchy, realistic Higgs-flavon potential and thermally produced dark matter at the same time. We discuss flavor violating processes induced by the light flavon which would be detected in future experiments. N sym-1 Recently, it is proposed that a flavon can be identified as the QCD axion [3-8] 2 See, e.g., Refs. [35,36] for recent models with a flavor modular symmetry and also for such interactions in string models.3 Models with a combination of Higgs doublets H u H d as a flavon are studied in Refs. [41][42][43].

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Creating the fermion mass hierarchies with multiple Higgs bosons

Cited by 35 publications

References 28 publications

Universal properties of pseudoscalar mediators in dark matter extensions of 2HDMs

Universal properties of pseudoscalar mediators in dark matter extensions of 2HDMs

What if the masses of the first two quark families are not generated by the standard model Higgs boson?

A low-scale flavon model with a ℤN symmetry

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